private void LateUpdate()
{
if (!adapter.PluginRunning() || FlightDriver.Pause)
{
return;
}
const double degree = Math.PI / 180;
var reference_rotation =
(UnityEngine.QuaternionD)adapter.Plugin().CameraReferenceRotation();
var camera_roll = UnityEngine.QuaternionD.AngleAxis(camera_roll_ / degree,
Vector3d.forward);
if (should_transfer_camera_coordinates)
{
UnityEngine.QuaternionD previous_referenced_pivot =
previous_camera_reference_rotation_ *
(UnityEngine.QuaternionD)PlanetariumCamera.fetch.GetPivot().rotation *
camera_roll;
// Note that we use a single-precision quaternion here because the
// double-precision one that comes with KSP does not implement Euler
// angles.
UnityEngine.Quaternion new_dereferenced_pivot =
UnityEngine.QuaternionD.Inverse(reference_rotation) *
previous_referenced_pivot;
double new_heading = (new_dereferenced_pivot.eulerAngles.y -
Planetarium.InverseRotAngle) *
degree;
double new_pitch = new_dereferenced_pivot.eulerAngles.x * degree;
// The camera cannot be given nonzero roll by camera controls, but we
// smoothly bring its roll to 0 over the course of a few frames to make
// the change in orientation continuous, and thus easier to follow:
// instantly flipping can be confusing if it is a large change, e.g. Earth
// equator to Uranus equator.
camera_roll_ =
((new_dereferenced_pivot.eulerAngles.z + 180) % 360 - 180) * degree;
// Unity has a very mad Euler angle convention that has pitch in
// [0, π/2] ∪ [3π/2, 2π].
if (new_pitch > Math.PI)
{
new_pitch -= 2 * Math.PI;
}
PlanetariumCamera.fetch.camHdg = (float)new_heading;
PlanetariumCamera.fetch.camPitch = (float)new_pitch;
// Use the old reference rotation for this frame: since the change to
// camera heading and pitch has yet to take effect, the new one would
// result in a weird orientation for one frame. Similarly, we keep the
// existing |camera_roll|.
reference_rotation = previous_camera_reference_rotation_;
should_transfer_camera_coordinates = false;
}
previous_camera_reference_rotation_ = reference_rotation;
// Both the scaled space and galaxy cameras are used in the flight scene as
// well as map view; they should not be reoriented there.
if (MapView.MapIsEnabled)
{
PlanetariumCamera.fetch.GetPivot().rotation =
reference_rotation *
(UnityEngine.QuaternionD)PlanetariumCamera.fetch.GetPivot().rotation *
camera_roll;
ScaledCamera.Instance.galaxyCamera.transform.rotation =
reference_rotation *
(UnityEngine.QuaternionD)ScaledCamera.Instance.galaxyCamera.transform.
rotation *
camera_roll;
}
if (camera_roll_ != 0)
{
// TODO(egg): Should we be doing this in LateUpdate?
const double roll_change_per_frame = 0.1 /*radians*/;
if (Math.Abs(camera_roll_) < roll_change_per_frame)
{
camera_roll_ = 0;
}
else
{
camera_roll_ += camera_roll_ > 0
? -roll_change_per_frame
: roll_change_per_frame;
}
}
}
private void LateUpdate()
{
if (!adapter.PluginRunning() || FlightDriver.Pause)
{
return;
}
var reference_rotation =
(UnityEngine.QuaternionD)adapter.Plugin().CameraReferenceRotation();
if (should_transfer_camera_coordinates)
{
UnityEngine.QuaternionD previous_referenced_pivot =
previous_camera_reference_rotation_ *
last_fresh_planetarium_camera_rotation_ *
camera_roll;
// Note that we use a single-precision quaternion here because the
// double-precision one that comes with KSP does not implement Euler
// angles.
UnityEngine.Quaternion new_dereferenced_pivot =
UnityEngine.QuaternionD.Inverse(reference_rotation) *
previous_referenced_pivot;
double new_heading = (new_dereferenced_pivot.eulerAngles.y -
Planetarium.InverseRotAngle) *
degree;
double new_pitch = new_dereferenced_pivot.eulerAngles.x * degree;
// The camera cannot be given nonzero roll by camera controls, but we
// smoothly bring its roll to 0 over the course of a few frames to make
// the change in orientation continuous, and thus easier to follow:
// instantly flipping can be confusing if it is a large change, e.g. Earth
// equator to Uranus equator.
camera_roll_ =
((new_dereferenced_pivot.eulerAngles.z + 180) % 360 - 180) * degree;
// Unity has a very mad Euler angle convention that has pitch in
// [0, π/2] ∪ [3π/2, 2π].
if (new_pitch > Math.PI)
{
new_pitch -= 2 * Math.PI;
}
PlanetariumCamera.fetch.camHdg = (float)new_heading;
PlanetariumCamera.fetch.camPitch = (float)new_pitch;
// The next LateUpdate would set the pivot rotation from the camera
// heading and pitch fields, but it would still be wrong for one frame
// when we adjust it below, and it would not happen when the camera
// controls are locked—which they most likely are. Do it ourselves.
PlanetariumCamera.fetch.GetPivot().rotation =
UnityEngine.Quaternion.Euler(new_dereferenced_pivot.eulerAngles.x,
new_dereferenced_pivot.eulerAngles.y,
0);
last_fresh_planetarium_camera_rotation_ =
PlanetariumCamera.fetch.GetPivot().rotation;
should_transfer_camera_coordinates = false;
}
previous_camera_reference_rotation_ = reference_rotation;
// Both the scaled space and galaxy cameras are used in the flight scene as
// well as map view; they should not be reoriented there.
if (MapView.MapIsEnabled)
{
// The pivot does not get updated when camera controls are locked, so we
// would be taking our previously corrected orientation as an uncorrected
// orientation in the next frame, leading to wild spin. Don’t do that.
if (InputLockManager.IsUnlocked(ControlTypes.CAMERACONTROLS))
{
last_fresh_planetarium_camera_rotation_ =
PlanetariumCamera.fetch.GetPivot().rotation;
}
PlanetariumCamera.fetch.GetPivot().rotation =
reference_rotation *
last_fresh_planetarium_camera_rotation_ *
camera_roll;
ScaledCamera.Instance.galaxyCamera.transform.rotation =
reference_rotation *
(UnityEngine.QuaternionD)ScaledCamera.Instance.galaxyCamera.transform.
rotation *
camera_roll;
}
if (camera_roll_ != 0)
{
// TODO(egg): Should we be doing this in LateUpdate?
const double roll_change_per_frame = 0.1 /*radians*/;
if (Math.Abs(camera_roll_) < roll_change_per_frame)
{
camera_roll_ = 0;
}
else
{
camera_roll_ += camera_roll_ > 0
? -roll_change_per_frame
: roll_change_per_frame;
}
}
}
